Amos denies what I said because it's embarrassing to him. He actually suffers from a rare disease, Arboritis, and is slowly becoming a tree (they think it will be a box elder and attract stinky bugs, not something majestic like an oak).

I thought that I should never see        
Poor old Amos as a tree.        

Poems are made by fools like me,        
But only Amos became a tree.